Reciprocating engine.



c. M. BOOTH.

HECIPROCTING ENGIN.

APPLICATlON FILED lULY 3| |916.

1,222,923.. Patented Apr. 17,1917.

CHARLES M. BooTH, or HALLEGK, onmronmn.

RECIPROCATING ENGINE.

Applicativi :ned 4July s, 191e. serial No. m7 475.

To all 'whom t may concern.'

Be it known that l, CHARLES M. BooTH,

, a citizen of the United States, residin' at Halleck, in the county of San Bernal' ino and Stute of lCalifornia, have invented a new and useful Improvement in Reciprocating Engines, ofivhich the following is a speci- .licatiom This improvement is designed more particularly 4to overcome certain diiiiculties in connection with internal combustion engincs, and particularly engines of the automobile type. In such engines the cylinders are vertical, and in case of piston trouble it is necessary to practically dismantle the engine in order to get at the piston.

In the present type of engines in general use it is necessary in order to get at the piston rings or the wrist-pin that the oil in jthe lower part of the crank case be drained ntf; the lower part of the crank case reiir'iloved; the connectingroddetached from 1the crank, and the head of the cylinder detachegl` freniV the cylinder. Then the conp necting rod4 ispushed up',` thus'pushing the piston out of the cylinder. Y

This is a laborious and tedious operation. The present invention is believed to offer a combination whereby the wrist-.pin and piston shell are easily separable by access from the top, thus enabling changes in the. piston riiigs and wrist-,pin to be made by simply removin'gffthe 'cylinderhead.g or more broadly considered, to so construct and combine the piston, wristpin and connecting rod that the piston head may be removed' so as to give accessto the wrist-pin and connecting rod from the top of the cylinder. An object of this invention is to 'acconr plishthis without any material change in 'Standard engine construction.

An object of the invention is to produce a. one-piece piston of light construction.

'An object is to provide a piston having* the foregoing advantages, and also being smooth` throughout the pressure receiving surface so as to minimize carbon accumulations.

An'ob'ect of the invention is to produce a piston w ich will hold the wrist-pin rigidly in lace andprevent lateral movement;

n'object of the invention is to produce a iston which will supply a protecting wall etweenthe wrist-pin and the wall of the cylinderV and yet allow easy access wrist-pin.

specification@ Letters Patent.

to the Patented Apr. 17, 1917.

A n object of the invention is to produce a piston, the rcugh form of which may be produced' by ary one of a number of me cha'nical processes.

Other objects, advantages and features of novelty may appear from the accompanying drawings, the subjoined description and al. pended claims.` j p The accomparying'drawings illustrate the invention.

Figure 1 is a fragmental` sectional eleva tion of parts oi an internal combustion en gine constructed in accordance with this in vention. in one of its forms. Section is taken on line w1. Fig. 2. y

Fig. 2 is an enlarged ragmental axial section of the form. shown -in Fig. l.

Fig. 3 is a transverse section o n line m5, Fig. 5

The piston consists in a hollow, shell comprising a cylindrical wall 1,a closed head 2 integral therevvi` 1h, and piston rings 3 seated in grooves/1 in tie wall inthe usual manner., The wall l is th'eaded as at 5 on its interior surface to engage the wrist-pin mounting 6 which consists o ifgenlarged ends of the` wristgin 7 that is u1 set to form said mounting.

aid. enlarged ends are threaded exterior-ly to engage the int erior threads 5 of the piston. The piston and wrist-pin mounting are secured from ,unstrewing from each other by a threaded pin 8 inserted from the top of the iston as sl .own and screwed into one inem er of the mounting 6.

The head 9 of the pin 8 is countersunk in the piston head 2 and is slotted to receive a screwdriver by which it may be seated and unseated. Said head 2 is also provided with seats 10 for a s1. anner Wrench and is other` wise smooth throughout so as to minimize carbon accumulations.

The upset portions or members 'at 6 are spaced apart and the intermediate portion'or wrist-pin 7 is cyindrical and the connecting rod l1 is connect ed'to seid in 7 in the ordi-Y nary Way by the separable caring 12, parts of which are helr. together b y bolts 13. Said connecting rod is connected with a .crank 14 in the usual mar ner.

The'engine cylinder is of standard construction comprising a main body 15, and a c linder head 1 connected thereto by suita de means as thobolts or cap screws 17.

With this for u`1 all that is necessary in order to get at Vthe rings or wristpin is simply-to remove the'cylinder head 16, then der, and when ina emove the lockin pin. 8, and then unscrew th: from t e wrist-pin mou'ntin .6.

Wrlt-pin mounting, can be readily'l withdrawn. y

The piston is provided with an internal shoulder 18 between the threaded portion 5 -and the head 2, so that when the piston is screwed home, the wrist-pin mounting 6 will engage the shoulder 18 and position the wrist-pin 7 at elrequired distance from. the head 2, thus makingl the relation of the wrist-pm andthe head conform to the pres# ent standard construction. B removing the bolts- 13 from the separable' caring 12 the wrist-pin can be gotten at. To rmssemble th'eparts the separable bearing l2 will be replaced and secured by the bolts 13, then the piston may be inserted into the cylinder' and screwed home on the mounting (i.

The method of assembling unddisussemblingjlle engine piston will be readily understood from the foregoing. The various formsshown may. be respectively adapted by the constructor according to convenience and facility of construction and are practicall assembled and disassembled with equal -fae' itly.

In ig.

1 the shell prevents lateral moveis done, the Ristori rises in the cy 1nv y .unscrewed `from .thel

vto fit' diametricall screw-threaded portion of ment of the wrist-pin, but is s constructed ves t0 be readily removed therefrom;

few

.j n an engine a low circular shell and internall' lower'end, a

iston comprising a holosed at the uper end screw-threaded rom the a wrist-pin screw-threaded in the screw-threaded portion of the shel 2, In an engine, a iston comprising a hollow circular shell eosed at the u per end and 'internally screw-.threaded rom the lower end, and .a wrist-pin having integral enlarged en ds screw -threaded to fit the theshell tol mount the wrist-pin diametrically.

V3. In an engine, a ion comprising a hollow vcircular shell c osed at the upper' end and internally screw threaded from the lower end up to a shoulder, a wrist-pin having integral enlarged ends screw-threaded to fit the screw-threaded portion of the shell against the shoulder, and a locking pin removablefrom the top.

Intestmonygvhereof, I have hereuntol set my hand at s Angeles, California, this 24th day of June, 1916;

CHARLES M. BOOTH. Witness: I

'JAMES R. TowNsn'Nn. 

